YS is 7 in the middle of the sheep, 7 in the height of the pig and 7 in the rhinoceros.
Personally, I suggest YS use LBB. If you have money, have a double-B high-smoking contest and bring a silent organ or a silent beast.
YS upgrade is still very tiring. After all, it's not an export major. No one can bring it, so I have to find FW myself.
These are just personal suggestions.
Young Pioneers and Red Scarves came to answer your questions.